Antarctica is slightly bigger than the entire United States (including Alaska and Hawaii), and close to one and a half times the size of the “lower 48” states alone.

Basic size comparison

  • Antarctica covers about 14–14.2 million km² (around 5.4–5.5 million square miles).
  • The United States (all states and territories) covers about 9.8 million km² (about 3.8 million square miles), so Antarctica is roughly 40–45% larger than the US.
  • Put another way, Antarctica is nearly 1½ times the size of the USA when you include its ice shelves and islands.

Easy ways to picture it

  • If you laid the map of the US over Antarctica, the icy continent would stick out around the edges in almost every direction.
  • Many guides describe Antarctica as larger than the United States and Mexico combined , which helps explain why it plays such a big role in climate and ocean systems.

Why maps make Antarctica look “weird”

  • On common world maps (like Mercator projections), the poles are stretched, so Antarctica often looks comically huge or oddly shaped compared to the US.
  • When its outline is put on a globe-corrected or interactive “true size” map, Antarctica still comes out bigger than the US—just not as absurdly enormous as flat maps suggest.

TL;DR: If you think of the entire United States and then “add almost half again,” that’s about how big Antarctica is compared to the US.

Information gathered from public forums or data available on the internet and portrayed here.